I have a large scale enterprise application (5 modules) project using RAD, WAS v7, Java EE 6 (EJB 3.1, JPA), ZK framework.
The project is using RAD as IDE. The problem is that it takes too long (more than 5 min) to deploy when
changes are made to the EJB's (although the changes are minor in only one file) but
when changes are made to zk framework (the web & presentation layer), it is fast to deploy.

Don't know what cause the problem. Is it because of EJB 3.1/ JPA or RAD/ WAS?
Has anyone encounter this experience/ problem before?
Is it happening in other IDE or applcation server also?
Appreciate any solution, suggestions or information.
Thank you.